Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - Senior Notes	Sep. 30, 2021	May 17, 2021	Dec. 31, 2020	May 27, 2020	Apr. 29, 2020
3.00% Senior Notes, due May 2030
Stated interest rate	3.00%				3.00%
4.5% Senior Notes
Stated interest rate	4.50%			4.50%	4.50%
2.625% Senior Notes, due June 2031
Stated interest rate	2.625%	2.625%
4.20% Senior Notes, due December 2021
Stated interest rate	4.20%		4.20%