Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Financial Instruments (Foreign Exchange Risk) (Details) € in Millions, kr in Millions, SFr in Millions, $ in Millions	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 31, 2020 DKK (kr)	Dec. 31, 2020 CHF (SFr)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 DKK (kr)	Dec. 31, 2019 CHF (SFr)
Cross-currency interest rate swap contracts
Derivative [Line Items]
Aggregate notional amount	$ 150	€ 650	kr 600	SFr 25	$ 150	€ 650	kr 600	SFr 25
Derivatives Not Designated as Hedging Instruments \| Foreign Exchange Forward
Derivative [Line Items]
Aggregate notional amount	$ 1,633				$ 1,364