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Contingencies (Health Care Cost Recovery Litigation) (Details) - Health Care Cost Recovery Actions [Member] $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 1998 USD ($) state	Dec. 31, 2019 USD ($) case	Dec. 31, 2018 USD ($) case	Dec. 31, 2017 USD ($) case
Loss Contingencies [Line Items]
Number of cases pending | case		1	1	1
Number of states with settled litigation | state	46
State settlement agreements annual payments	$ 9,400
State settlement agreements attorney fees annual cap	$ 500
Litigation settlement		$ 4,200	$ 4,200	$ 4,500
Threatened Litigation [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of cases pending | case		10

X

- Definition

Litigation Settlement, Annual Legal Fees Payable, Maximum

+ References

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- Definition

Litigation Settlement, Annual Payment Amount

+ References

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- Definition

Loss Contingency, Number of States with Settled Litigation

+ References

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- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

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+ Details

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

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- Details

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- Details

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