Long-Term Obligations (India Indebtedness) (Details) ₨ in Millions, $ in Millions	Dec. 31, 2017 USD ($)	Dec. 31, 2017 INR (₨)
Debt Instrument [Line Items]
Long-term debt	$ 20,205.1
Secured Debt | Viom Term Loan
Debt Instrument [Line Items]
Long-term debt	418.7	₨ 26,740
Secured Debt | Viom Debenture
Debt Instrument [Line Items]
Long-term debt	$ 93.9	₨ 6,000
Long-term debt, stated interest rate	9.55%	9.55%
Line of Credit | Viom Working Capital Facilities
Debt Instrument [Line Items]
Long-term debt	$ 0.0	₨ 0
Minimum | Secured Debt | Viom Term Loan
Debt Instrument [Line Items]
Long-term debt, stated interest rate	7.90%	7.90%
Minimum | Line of Credit | Viom Working Capital Facilities
Debt Instrument [Line Items]
Long-term debt, stated interest rate	8.05%	8.05%
Maximum | Secured Debt | Viom Term Loan
Debt Instrument [Line Items]
Long-term debt, stated interest rate	8.65%	8.65%
Maximum | Line of Credit | Viom Working Capital Facilities
Debt Instrument [Line Items]
Long-term debt, stated interest rate	8.75%	8.75%