Debt - Narrative (Details) - Senior Unsecured Notes - USD ($)	3 Months Ended
Mar. 31, 2021	Aug. 31, 2020
Line of Credit Facility [Line Items]
Interest expense	$ 11,100,000
1.750% Senior Notes due September 2030
Line of Credit Facility [Line Items]
Debt, principal amount		$ 1,250,000,000
2.800% Senior Notes due September 2050
Line of Credit Facility [Line Items]
Debt, principal amount		$ 750,000,000

Amount of the cost of borrowed funds accounted for as interest expense for debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration