XML 51 R39.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Long-term Debt (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross |  | $ 3,261.5 | $ 1,287.6
Long-term Debt, Current Maturities |  | 0.1 | 2.0
Long-term Debt, Excluding Current Maturities |  | 3,261.4 | 1,285.6
3.50% Notes Due 2020 (less unamortized discount and issuance costs of $0.9 and $2.9, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Par Value |  | $ 500.0 |
Maturity Date |  | Oct. 01, 2020 |
Interest Rate Stated Percentage |  | 3.50% |
Debt Instrument, Interest Rate, Effective Percentage |  | 3.89% |
Unamortized Discount |  | $ 0.9 |
Issuance Cost |  | 2.9 |
Long-term Debt, Gross |  | 496.2 | 0.0
Long-term Debt, Fair Value | [1] | $ 500.1 | 0.0
3.75% Notes Due 2021 (less unamortized discount and issuance costs of $0.3 and $3.2, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Maturity Date |  | Oct. 01, 2021 |
Interest Rate Stated Percentage |  | 3.75% |
Debt Instrument, Interest Rate, Effective Percentage |  | 3.98% |
Unamortized Discount |  | $ 0.3 |
Issuance Cost |  | 3.2 |
Long-term Debt, Gross |  | 496.5 | 0.0
Long-term Debt, Fair Value | [1] | 500.8 | 0.0
4.00% Notes Due 2022 (less unamortized discount and issuance costs of $1.1 and $0.9, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Par Value |  | $ 250.0 |
Maturity Date |  | Mar. 15, 2022 |
Interest Rate Stated Percentage |  | 4.00% |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.13% |
Unamortized Discount |  | $ 1.1 |
Issuance Cost |  | 0.9 |
Long-term Debt, Gross |  | 248.0 | 247.6
Long-term Debt, Fair Value | [1] | 249.9 | 259.0
3.75% Notes Due 2023 (less unamortized discount and issuance costs of $0.7 and $1.8, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Par Value |  | $ 500.0 |
Maturity Date |  | Feb. 15, 2023 |
Interest Rate Stated Percentage |  | 3.75% |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.32% |
Unamortized Discount |  | $ 0.7 |
Issuance Cost |  | 1.8 |
Long-term Debt, Gross |  | 497.5 | 497.1
Long-term Debt, Fair Value | [1] | 494.9 | 513.2
4.20% Notes Due 2024 (less unamortized discount and issuance costs of $0.6 and $2.3, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Par Value |  | $ 500.0 |
Maturity Date |  | Apr. 15, 2024 |
Interest Rate Stated Percentage |  | 4.20% |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.24% |
Unamortized Discount |  | $ 0.6 |
Issuance Cost |  | 2.3 |
Long-term Debt, Gross |  | 497.1 | 496.7
Long-term Debt, Fair Value | [1] | 501.6 | 524.2
4.65% Notes Due 2028 (less unamortized discount and issuance costs of $1.7 and $4.4, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Par Value |  | $ 500.0 |
Maturity Date |  | Oct. 01, 2028 |
Interest Rate Stated Percentage |  | 4.65% |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.78% |
Unamortized Discount |  | $ 1.7 |
Issuance Cost |  | 4.4 |
Long-term Debt, Gross |  | 493.9 | 0.0
Long-term Debt, Fair Value | [1] | 500.6 | 0.0
5.40% Notes Due 2048 (less unamortized discount and issuance costs of $2.8 and $5.6, respectively) |  |  |
Debt Instrument [Line Items] |  |  |
Par Value |  | $ 500.0 |
Maturity Date |  | Oct. 01, 2048 |
Interest Rate Stated Percentage |  | 5.40% |
Debt Instrument, Interest Rate, Effective Percentage |  | 5.48% |
Unamortized Discount |  | $ 2.8 |
Issuance Cost |  | 5.6 |
Long-term Debt, Gross |  | 491.6 | 0.0
Long-term Debt, Fair Value | [1] | 497.3 | 0.0
Other notes payable and capitalized leases |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross |  | 40.7 | 46.2
Long-term Debt, Fair Value | [1] | $ 40.7 | $ 46.2
[1] | See Note 13 for information on the fair value measurement of our long-term debt.

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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)(1) -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(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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: 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 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt3.50NoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt3.75NoteDuein2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt4.00NoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt3.75NoteDuein2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt4.20NotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt4.65NotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ipg_UnsecuredDebt5.40NotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |