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Debt Obligations (1.75% Senior Unsecured Notes) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($)
Debt Instrument [Line Items] |
Payments (Accretions) of Long-term Debt | $ 1,217
Senior Notes | 1.75% senior unsecured notes due May 19, 2023 |
Debt Instrument [Line Items] |
Stated rate | 1.75%
Maximum interest rate on debt instrument | 3.75%
Payments (Accretions) of Long-term Debt | $ 42

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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