Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method.

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Earnings Per Share (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		106 Months Ended
	Nov. 06, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Nov. 06, 2019
Earnings Per Share
Common stock repurchased, shares		1,025	932	3,585	4,695
Common stock repurchased, average price per share		$ 377.85	$ 306.22	$ 364.84	$ 266.48
Common stock repurchased, value		$ 387,255	$ 285,183	$ 1,307,947	$ 1,251,013
Subsequent event [Member]
Earnings Per Share
Common stock repurchased, shares	100					76,000
Common stock repurchased, average price per share	$ 393.84					$ 159.13
Common stock repurchased, value	$ 34,800					$ 12,100,000