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Financing arrangements (interest rate swaps textual interim only) (Details) - Notes [Member] $ in Millions	Sep. 30, 2021 USD ($)
2.45% notes due 2030 (2.45% 2030 Notes) [Member]
Debt Instrument [Line Items]
Notional amounts	$ 1,000
Interest rate, stated percentage	2.45%
2.45% notes due 2030 (2.45% 2030 Notes) [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Derivative, Basis Spread on Variable Rate	1.00%
2.30% notes due 2031 (2.30% 2031 Notes) [Member]
Debt Instrument [Line Items]
Notional amounts	$ 500
Interest rate, stated percentage	2.30%
2.30% notes due 2031 (2.30% 2031 Notes) [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Derivative, Basis Spread on Variable Rate	0.80%

X

- Definition

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

+ References

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

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- Definition

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+ References

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- Definition

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+ References

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=125515794&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=125515794&loc=SL5579245-113959

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