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Borrowings - Additional Information (Detail) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 20, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Nov. 20, 2017 USD ($) | May 16, 2016 USD ($) | May 21, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Ownership percentage of subsidiaries |  | 50.00% |  |  |  |
Total long-term debt |  | $ 2,158,825,000 | $ 2,249,552,000 |  |  |
Standby Letters of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility amount outstanding |  | $ 2,100,000 | $ 3,200,000 |  |  |
Securitization Program |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate |  | 3.25% | 2.31% |  |  |
Maximum amount available under receivable securitization |  | $ 50,000,000 |  |  |  |
Securitization program, at a rate of 3.25% at December 31, 2018 and 2.31% at December 31, 2017 |  | $ 50,000,000 | $ 50,000,000 |  |  |
2017 Credit Agreement |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate | 2.00% |  |  |  |  |
Leverage ratio, required | 4.50 |  |  |  |  |
Maximum secured leverage ratio | 3.50 |  |  |  |  |
Interest coverage ratio, required | 3.50 |  |  |  |  |
2017 Credit Agreement | LIBOR | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.25% |  |  |  |  |
2017 Credit Agreement | LIBOR | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 2.50% |  |  |  |  |
2017 Credit Agreement | Federal Funds |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 0.50% |  |  |  |  |
2017 Credit Agreement | Adjusted LIBOR |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.00% |  |  |  |  |
2017 Credit Agreement | Adjusted LIBOR | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 0.25% |  |  |  |  |
2017 Credit Agreement | Adjusted LIBOR | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.50% |  |  |  |  |
2017 Credit Agreement | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt, term | 5 years |  |  |  |  |
Maximum amount available for borrowing | $ 1,000,000,000.0 |  |  |  |  |
2017 Credit Agreement | Term Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum amount available for borrowing | $ 750,000,000.0 |  |  |  |  |
5.25% Senior Notes due 2024 | Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 0.50% |  |  |  |
Interest rate |  | 5.25% | 5.25% |  |  | 5.25%
Senior notes |  | $ 250,000,000 | $ 250,000,000 |  |  | $ 250,000,000
Ownership percentage of subsidiaries |  | 100.00% |  |  |  |
5.25% Senior Notes due 2024 | Senior Notes | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Declining percent of redemption price to principal amount |  | 0.875% |  |  |  |
5.25% Senior Notes due 2024 | Senior Notes | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount |  | 102.625% |  |  |  |
Declining percent of redemption price to principal amount |  | 100.00% |  |  |  |
5.25% Senior Notes due 2024 | Senior Notes | Debt Instrument Redemption Prior To June 15, 2019 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount on redemption |  | 100.00% |  |  |  |
Make whole premium as percentage of principal amount of notes subject to redemption |  | 1.00% |  |  |  |
4.875% Senior Notes due 2026 | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Declining percent of redemption price to principal amount |  | 0.813% |  |  |  |
4.875% Senior Notes due 2026 | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Declining percent of redemption price to principal amount |  | 100.00% |  |  |  |
4.875% Senior Notes due 2026 | Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 50.00% |  |  |  |
Interest rate |  |  |  |  | 4.875% |
Senior notes |  |  |  |  | $ 400,000,000 |
4.875% Senior Notes due 2026 | Senior Notes | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount |  | 102.438% |  |  |  |
4.625% Senior Notes due 2027 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt issuance, line of credit |  | $ 7,900,000 |  |  |  |
4.625% Senior Notes due 2027 | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Declining percent of redemption price to principal amount |  | 0.771% |  |  |  |
4.625% Senior Notes due 2027 | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Declining percent of redemption price to principal amount |  | 100.00% |  |  |  |
4.625% Senior Notes due 2027 | Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  | 50.00% |  |  |  |
Interest rate |  | 4.625% | 4.625% | 4.625% |  |
Senior notes |  | $ 500,000,000 | $ 500,000,000 | $ 500,000,000 |  |
4.625% Senior Notes due 2027 | Senior Notes | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount |  | 102.313% |  |  |  |
4.625% Senior Notes due 2027 | Senior Notes | Debt Instrument Redemption Prior To June 1, 2019 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount on redemption |  | 104.875% |  |  |  |
Percent of principal amount of notes redeemable |  | 40.00% |  |  |  |
4.625% Senior Notes due 2027 | Senior Notes | Debt Instrument Redemption Prior To June 1, 2021 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount on redemption |  | 100.00% |  |  |  |
Make whole premium as percentage of principal amount of notes subject to redemption |  | 1.00% |  |  |  |
4.625% Senior Notes due 2027 | Senior Notes | Debt Instrument Redemption Prior To November 15, 2020 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of redemption price to principal amount on redemption |  | 104.625% |  |  |  |
Percent of principal amount of notes redeemable |  | 40.00% |  |  |  |

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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