How wide is the retirement gap is between men and women?

From a recent Bloomberg article (my emphasis in bold):

While both men and women face big retirement-savings challenges, the hurdle is higher for many women. To have a decent standard of living in old age, women, who earn on average 78 cents to a man's dollar, need to save $126 for every $100 men do...

5 Important Estate Planning Documents

Let’s be frank – nobody likes to think about the end of their life. It’s unpleasant and can put you in a real downer of a mood. This is probably why estate planning is the financial planning topic I’m least asked about. But just like your retirement and investments, estate planning also needs forethought and management when taking a comprehensive look at your personal finances...