Stock Plans (Restricted Shares Outstanding) (Details) - 2021 Incentive Plan [Member] $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 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
Restricted stock granted (in shares) | shares	240
Restricted stock forfeited (in shares) | shares	(9)
Balance at end of period (in shares) | shares	3,375
Balance at beginning of period (in dollars per shares) | $ / shares	$ 25.62
Restricted stock granted (in dollars per shares) | $ / shares	25.97
Restricted stock forfeited (in dollars per shares) | $ / shares	25.61
Balance at end of period (in dollars per shares) | $ / shares	$ 25.64
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of period (in shares) | shares	2,483
Restricted stock granted (in shares) | shares	760
Restricted stock vested (in shares) | shares	(86)
Restricted stock forfeited (in shares) | shares	(50)
Balance at end of period (in shares) | shares	3,107
Balance at beginning of period (in dollars per shares) | $ / shares	$ 28.67
Restricted stock granted (in dollars per shares) | $ / shares	26.04
Restricted stock vested (in dollars per shares) | $ / shares	25.73
Restricted stock forfeited (in dollars per shares) | $ / shares	26.04
Balance at end of period (in dollars per shares) | $ / shares	$ 25.85
Balance at beginning of period | $	$ 72
Restricted stock granted | $	21
Restricted stock vested | $	(2)
Restricted stock forfeited | $
Balance at end of period | $	$ 86