Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Long-Term Debt (Commercial Paper) (Details) - USD ($)				9 Months Ended	12 Months Ended
Long-Term Debt (Commercial Paper) (Details) - USD ($)	Jul. 31, 2015	Feb. 28, 2014	Dec. 19, 2012	Sep. 28, 2019	Dec. 31, 2019	Oct. 18, 2019	Dec. 31, 2018	Sep. 11, 2014
Line of Credit Facility [Line Items]
Maturity period of debt			3 years
Maximum borrowing capacity under credit facility			$ 300,000					$ 500,000
United States \| Commercial Paper
Line of Credit Facility [Line Items]
Maturity period of debt					21 days
Maximum borrowing capacity under credit facility						$ 1,800,000,000
Weighted average interest rate on debt					2.03%
United States \| Maximum \| Commercial Paper
Line of Credit Facility [Line Items]
Maturity period of debt		397 days
Europe \| Commercial Paper
Line of Credit Facility [Line Items]
Maturity period of debt	183 days			24 days 12 hours
Weighted average interest rate on debt					(0.24%)
Carrying Value \| United States
Line of Credit Facility [Line Items]
Commercial paper					$ 317,000,000		$ 632,668,000
Carrying Value \| Europe
Line of Credit Facility [Line Items]
Commercial paper					$ 376,946,000		$ 707,175,000