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LONG-TERM DEBT AND FINANCING ARRANGEMENTS - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Nov. 30, 2012 | Dec. 28, 2019 | Mar. 31, 2018 | Dec. 30, 2017 | Jul. 01, 2017 | Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017 | Jan. 03, 2015 | Sep. 29, 2018 | Sep. 30, 2017 | Apr. 01, 2017 | Dec. 28, 2013 | Jul. 31, 2012
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of long-term debt maturing in year two |  |  | $ 400.0 |  |  |  | $ 400.0 |  |  |  |  |  |  |  |
Principal amount of long-term debt maturing in year three |  |  | 754.3 |  |  |  | 754.3 |  |  |  |  |  |  |  |
Principal amount of long-term debt maturing after year five |  |  | 2,050.0 |  |  |  | 2,050.0 |  |  |  |  |  |  |  |
Fair Value Adjustment Of Debt |  |  | 9.0 |  |  |  | 9.0 |  |  |  |  |  |  |  |
Fair value adjustment and unamortized gain termination of swap |  |  | (16.4) |  |  |  | (16.4) |  |  |  |  |  |  |  |
Interest paid |  |  |  |  |  |  | 252.9 | $ 249.6 | $ 198.3 |  |  |  |  |  |
Long-term debt, face amount |  |  | 3,204.3 |  |  |  | 3,204.3 |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  |  | 1,150.0 | 977.5 | 2.8 |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  | 990.0 |  |  |  |  |  |  |  |
Unamortized debt discount |  |  | 1.9 |  |  |  | 1.9 |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  | 9.1 |  |  |  |  |  |  |  |
Payments of debt extinguishment costs | $ 45.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  | (17.9) | 0.0 | 0.0 | $ 0.1 |  |  |  |  |
Amortization of Debt Discount (Premium) |  |  |  |  |  |  |  |  |  | 0.3 |  |  |  |  |
Commercial Paper and Credit Facilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 3,500.0 |  |  |  | 3,500.0 |  |  |  |  |  |  |  |
Short-term credit lines |  |  | $ 337.3 |  |  |  | $ 337.3 | $ 376.1 |  |  |  |  |  |  |
Equity Unit Shares Issuable Upon Conversion [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share |  |  | $ 2.5 |  |  |  | $ 2.5 | $ 2.5 |  |  |  |  |  |  |
Equity Units Conversion Rate Number Of Common Stock Shares |  |  | 0.6272 |  | 0.7279 | 0.7241 |  |  |  |  |  |  |  |  |
Convertible Preferred Units [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase Of Call Options |  |  | $ 19.2 | $ 57.3 |  | $ 25.1 | $ (19.2) | $ (57.3) | (25.1) |  |  |  |  |  |
Convertible preferred stock, liquidation preference |  |  | $ 1,000 |  |  | $ 1,000 | $ 1,000 |  |  |  |  | $ 1,000 |  |  |
Interest expense recorded |  |  |  |  |  |  | $ 284.3 | $ 277.9 | 222.6 |  |  |  |  |  |
Common Stock, Shares, Issued |  |  | 176,902,738 |  |  |  | 176,902,738 | 176,902,738 |  |  |  |  |  |  |
Commercial Paper Maximum Borrowing Capacity |  |  | $ 3,000.0 |  |  |  | $ 3,000.0 |  |  |  | $ 3,000.0 |  | $ 3,000.0 |  |
Commercial Paper Amount Outstanding |  |  | 335.5 |  |  |  | 335.5 | $ 228.9 |  |  |  |  |  |  |
Euro Denominated Commercial paper [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Units [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper Amount Outstanding |  |  |  |  |  |  |  | $ 373.0 |  |  |  |  |  |  |
2018 Credit Agreement [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper and Credit Facilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | $ 1,000.0 |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper and Credit Facilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 521.2 |  |  |  | 521.2 |  |  |  |  |  |  |  |
Line of credit facility, available borrowing capacity |  |  | 432.5 |  |  |  | 432.5 |  |  |  |  |  |  |  |
Short-term credit lines |  |  | 337.3 |  |  |  | 337.3 |  |  |  |  |  |  |  |
Letter of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper and Credit Facilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term credit lines |  |  | $ 88.8 |  |  |  | 88.8 |  |  |  |  |  |  |  |
Junior Subordinated Debt [Member] | Fixed To Floating Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  | 1,487.0 |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  | $ 13.4 |  |  |  |  |  |  |  |
Notes payable due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, face amount |  | $ 800.0 |  |  |  |  |  |  |  | $ 45.7 |  |  |  |  |
Long-term debt, interest rate |  | 2.90% |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  | $ 793.9 |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  | 0.7 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  | $ 5.4 |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, repurchase price as a percent of principal amount |  | 101.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Notes paybable due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 2.90% |  |  |  | 2.90% | 2.90% |  |  |  |  |  |  |
Unamortized debt discount |  |  | $ 0.2 |  |  |  | $ 0.2 |  |  |  |  |  |  |  |
Notes payable due 2052 (junior subordinated) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, face amount |  |  | $ 0.0 |  |  |  | $ 0.0 |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 5.75% |  |  |  | 5.75% | 5.75% |  |  |  |  |  |  | 5.75%
Repayments of Long-term Debt |  |  |  |  |  |  | $ 760.5 |  |  |  |  |  |  |  |
Junior subordinated notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750.0
Long-term debt, including current maturities |  |  | $ 0.0 |  |  |  | 0.0 | $ 731.6 |  |  |  |  |  |  |
Notes payable due 2052 (junior subordinated) | Fixed To Floating Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  |  | 0.0 |  |  |  | 0.0 |  |  |  |  |  |  |  |
Notes payable due 2052 (junior subordinated) | Fixedto Floating Interest Rate Swaps Terminated [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Adjustment Of Debt |  |  | 0.0 |  |  |  | 0.0 |  |  |  |  |  |  |  |
Notes payable due 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, including current maturities |  |  | $ 406.0 |  |  |  | 406.0 | $ 409.1 |  |  |  |  |  |  |
Notes 5 Point 75 Percent due 2053 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.75% |
Repayments of Long-term Debt |  |  |  |  |  |  | $ 405.7 |  |  |  |  |  |  |  |
Long-term debt, including current maturities |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400.0 |
Notes payable due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 7.05% |  |  |  | 7.05% | 7.05% |  |  |  |  |  |  |
Long-term debt, including current maturities |  |  | $ 168.3 |  |  |  | $ 168.3 | $ 170.4 |  |  |  |  |  |  |
Notes payable due 2028 | Fixed To Floating Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Adjustment Of Debt |  |  | 9.0 |  |  |  | 9.0 |  |  |  |  |  |  |  |
Fair value adjustment and unamortized gain termination of swap |  |  | (9.0) |  |  |  | (9.0) |  |  |  |  |  |  |  |
Long-term debt, face amount |  |  | 150.0 |  |  |  | 150.0 |  |  |  |  |  |  |  |
Notes 5 Point 20 Percent Due 2040 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Adjustment Of Debt |  |  | $ 0.0 |  |  |  | $ 0.0 |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 5.20% |  |  |  | 5.20% | 5.20% |  |  |  |  |  |  |
Unamortized debt discount |  |  | $ 0.2 |  |  |  | $ 0.2 |  |  |  |  |  |  |  |
Long-term debt, including current maturities |  |  | 366.5 |  |  |  | 366.5 | $ 364.9 |  |  |  |  |  |  |
Notes 5 Point 20 Percent Due 2040 [Member] | Fixed To Floating Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, face amount |  |  | 400.0 |  |  |  | 400.0 |  |  |  |  |  |  |  |
Convertible Notes Payable two Point four Five Percent Due Twenty Eighteen [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Units [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense recorded |  |  |  |  |  |  |  |  | $ 15.5 |  |  |  |  |  |
Notes Payable, Other Payables [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, face amount |  |  | 0.0 |  |  |  | 0.0 |  |  |  |  |  |  |  |
Long-term debt, including current maturities |  |  | $ 0.0 |  |  |  | $ 0.0 | $ 7.9 |  |  |  |  |  |  |
Notes Payable, Other Payables [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 4.50% |  |  |  | 4.50% | 4.50% |  |  |  |  |  |  |
Notes Payable, Other Payables [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate |  |  | 0.00% |  |  |  | 0.00% | 0.00% |  |  |  |  |  |  |
Notes Payable, Other Payables [Member] | Fixed To Floating Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  |  | $ 0.0 |  |  |  | $ 0.0 |  |  |  |  |  |  |  |
Notes Payable, Other Payables [Member] | Fixedto Floating Interest Rate Swaps Terminated [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Adjustment Of Debt |  |  | $ 0.0 |  |  |  | $ 0.0 |  |  |  |  |  |  |  |
United States of America, Dollars | Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper and Credit Facilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rates on short-term borrowings |  |  | 2.30% |  |  |  | 2.30% |  |  |  |  |  |  |  |
Euro Member Countries, Euro | Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper and Credit Facilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rates on short-term borrowings |  |  | 0.30% |  |  |  | 0.30% | 0.03% |  |  |  |  |  |  |

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