Stock Plans (Target Performance Shares) (Details) - 2021 Incentive Plan [Member] $ / shares in Units, shares in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of period (in shares) | shares	3,144
Target performance shares awarded, net (in shares) | shares	257
Target performance shares forfeited (in shares) | shares	(9)
Balance at end of period (in shares) | shares	3,392
Balance at beginning of period (in dollars per shares) | $ / shares	$ 25.62
Target performance shares awarded, net (in dollars per shares) | $ / shares	25.85
Target performance shares forfeited (in dollars per shares) | $ / shares	25.61
Balance at end of period (in dollars per shares) | $ / shares	$ 25.64
Balance at beginning of period | $	$ 92
Target performance shares awarded, net | $	7
Balance at end of period | $	$ 90