Revenue Recognition and Related Costs (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Jan. 01, 2018 |
Dec. 31, 2017 |
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| Revenue from Contract with Customer [Abstract] | |||
| Trade receivables, allowance for doubtful accounts | $ 45.8 | $ 74.2 | |
| Contract assets | 44.3 | $ 26.1 | |
| Deferred revenue | 877.9 | 999.5 | |
| Revenue recognized | 901.4 | ||
| Aggregate assets associated with incremental costs to obtain a contract and contract fulfillment costs | 73.0 | $ 68.1 | |
| Amortization related to contract costs | $ 99.8 | ||
| Unsatisfied performance obligations, description of timing | Revenue from customers who are subject to contracts is generally recognized over the term of such contracts, which is typically 12 months for our residential service contracts, one to three years for our mobile service contracts and one to five years for our B2B service contracts. |
| X | ||||||||||
- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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