Stockholders' Equity (Deficit) - Narrative (Details)			3 Months Ended				9 Months Ended
	Jul. 29, 2020 $ / shares	Jul. 28, 2020 $ / shares	Dec. 31, 2020 USD ($) vote $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2020 shares	Dec. 31, 2019 $ / shares	Dec. 31, 2020 USD ($) vote $ / shares	Dec. 31, 2019 $ / shares	Jan. 31, 2021 USD ($)
Accelerated Share Repurchases [Line Items]
Number of votes per share of common stock permitted on proposals presented to stockholders (vote) | vote			1				1
Dividends declared per common share (in dollars per share) | $ / shares	$ 0.42	$ 0.41	$ 0.42			$ 0.41	$ 1.25	$ 1.21
Average price of shares repurchased (in usd per share) | $ / shares				$ 151.23
Authorized amount available for future repurchases | $			$ 1,000,000,000.0				$ 1,000,000,000.0
Subsequent Event
Accelerated Share Repurchases [Line Items]
Approved increase to the authorized share repurchase amount | $									$ 2,000,000,000.0
Accelerated Share Repurchase
Accelerated Share Repurchases [Line Items]
Common stock repurchased (in shares) | shares					0
Open Market Share Repurchase Transactions
Accelerated Share Repurchases [Line Items]
Common stock repurchased (in shares) | shares			1,500,000	1,800,000
Shares repurchased | $			$ 231,000,000	$ 269,000,000
Average price of shares repurchased (in usd per share) | $ / shares			$ 151.12