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Contingencies and Commitments (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Loss Contingencies [Line Items]
Charges during period	$ 98
Payments during period	180
Minimum
Loss Contingencies [Line Items]
Estimate of possible loss	410
Maximum
Loss Contingencies [Line Items]
Estimate of possible loss	$ 545

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Amount of cash outflow reducing loss contingency liability.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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